柴油发动机的水箱冷却液加注口向外在量喷水气泡，看起来像锅中烧开了水似的，人们俗称这种现象叫柴油发动机“开锅”了。
一、柴油发动机高水温，导致柴油机回水箱水道管高水温，液体沸腾膨胀，从而加注口喷出，岀现这种情况，建议根据下面几个方面检查处理引起高水温问题：（出现本问题的情况可能性比较少，多数是后面的两个故发动障）
1、柴油发动机水管中有空气，起动后出水管气阻循环不畅，会导致水温上升，间歇时喷水，也有点像开锅了；
2、柴油发动机循环水量不足，在高负荷或负荷运行下，润滑机油温度也升高，也会导致水温不断上升；
3、柴油发动机循环淡水泵损坏；
4、柴油发动机散热风扇损坏（缺叶片或叶片边损坏），导致散热风量不够，也会引起水温不断上升；
5、柴油发电机散热风扇皮带过松，散热风扇速度达不到要求，导致散热风量不够，也会引起水温不断上升；
6、柴油发动机是开式冷却循环系统，外循环水源水位过低（水量不足），淡水泵吸不上水；
7、柴油发动机是闭式冷却循环系统，散热器（水箱）表面积污垢太多，散热不良等。
二、柴油发动机气缸床垫损坏冲掉了，气道与水道窜通，使缸内高压空气进入低压水道，最终通过冷却液加注口排出形成气泡，建议检查核实，如是则更换气缸床垫。三、柴油发动机缸盖破裂，气道与水道窜通，使缸内高压空气进入低压水道，最终通过冷却液加注口排出形成气泡，建议拆下缸盖水压试验检查核实，如是则更换缸盖（一般是不能修复的）。
The coolant filling port of the diesel engine's water tank sprays water bubbles outward, making it look like water has boiled in a pot. People commonly refer to this phenomenon as the "boiling" of the diesel engine.
1、 The high water temperature in the diesel engine leads to high water temperature in the return water pipe of the diesel engine, causing the liquid to boil and expand, resulting in the injection of fuel from the filling port. If this situation occurs, it is recommended to check and deal with the high water temperature problem according to the following aspects: (The possibility of this problem occurring is relatively low, mostly due to the last two engine failures)
1. There is air in the water pipe of the diesel engine, and after starting, the air resistance circulation of the outlet pipe is not smooth, which can cause the water temperature to rise. Spraying water intermittently is also a bit like boiling a pot;
2. Insufficient circulating water in diesel engines can cause the lubricating oil temperature to rise during high load or load operation, leading to a continuous increase in water temperature;
3. Diesel engine circulating fresh water pump damaged;
4. Damage to the cooling fan of a diesel engine (due to missing blades or damaged blade edges) can result in insufficient cooling airflow and cause the water temperature to continuously rise;
5. The belt of the diesel engine cooling fan is too loose, and the speed of the cooling fan cannot meet the requirements, resulting in insufficient cooling air volume and continuous rise of water temperature;
6. Diesel engines have an open cooling cycle system, and the water level of the external circulation water source is too low (insufficient water volume), causing the fresh water pump to be unable to draw in water;
7. Diesel engines have a closed cooling cycle system, with excessive dirt on the surface of the radiator (water tank) and poor heat dissipation.
2、 The cylinder mattress of the diesel engine is damaged and washed away, causing the air passage and water passage to become open, allowing high-pressure air in the cylinder to enter the low-pressure water passage. Eventually, bubbles are formed and discharged through the coolant filling port. It is recommended to check and verify, and if so, replace the cylinder mattress. 3、 The cylinder head of a diesel engine ruptures, causing the air passage and water channel to become open, allowing high-pressure air in the cylinder to enter the low-pressure water channel. Eventually, bubbles are formed and discharged through the coolant filling port. It is recommended to remove the cylinder head and conduct a water pressure test to verify. If so, replace the cylinder head (which is generally irreparable).
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